Retevis RM21 5W Floating VHF Marine Radio, 1-Pack, IP67 Waterproof, AI Noise Reduction

The Retevis RM21 is a rugged, floating VHF marine handheld radio that delivers up to 5W power, AI-driven noise reduction, IP67 waterproofing, and a 1800mAh battery for reliable all-day communication on the water.

Designed for boaters, anglers and crews who need clear, dependable radio contact in windy, wet or engine-noisy environments, the RM21 blends performance features with practical safety tools. It offers selectable transmit power levels, one-press AI noise cancellation, NOAA weather alerts and an automatic float-and-flash rescue indicator — all in a compact handheld package with a charging dock.

How does the RM21 keep voice communication clear in noisy marine conditions?

The RM21 uses a one-button AI noise reduction system that targets wind, engine and wave interference so your transmissions remain intelligible. You don’t need complex menus — a single press engages the filter and reduces background noise while preserving speech clarity.

• AI intelligent noise cancellation tuned for marine noise profiles
• One-press activation for instant clarity
• Improved readability in windy or high-deck vibration situations

What safety and survival features does this handheld boat radio offer?

This radio includes an automatic floating function that activates a red flashing alarm when it contacts water, making recovery easier after a drop. It also monitors channel 16 instantly for distress calls and receives NOAA weather alerts so you stay informed about changing conditions.

• Floating design with falling-water flash alarm for quick location
• Instant channel 16 watch for coast guard and emergency traffic
• NOAA weather alert reception for real-time marine warnings

How long will the battery last during a day on the water?

Equipped with a high-capacity 1800mAh lithium-ion battery, the RM21 is built for extended outings: expect around 10 hours of active use and up to 60 hours on standby under typical conditions. Energy-saving modes and selectable transmit power help stretch runtime when you need it most.

• 1800mAh rechargeable battery with long runtimes
• Battery saver mode reduces power draw during idle periods
• HI/MI/LO (5W/3W/1W) transmit power to match range vs. battery needs

Is the RM21 durable enough for saltwater and rough handling?

The RM21 meets IP67 waterproofing standards so it withstands immersion and heavy spray, and the housing is built to resist daily marine wear. The float-and-flash feature not only aids recovery but also helps protect the radio from permanent loss in wet environments.

• IP67 rating for dustproofing and temporary immersion protection
• Floating capability reduces the chance of losing the radio overboard
• Robust exterior designed for use on kayaks, sailboats, fishing boats and yachts

Who is this for? The Retevis RM21 is aimed at recreational and small commercial mariners — anglers, sailing crews, water guides and boat owners — who want a compact, reliable VHF radio with strong safety features. It is especially useful for users who value clear voice transmission in noisy conditions, long battery life for day trips, and straightforward operation with safety-first functions like channel 16 instant watch, NOAA alerts and a visible floating alarm.